chore: hide sensitive vars (#8)

* feat: enable sensitive vars

Author: datnguye

modules/github/variables.tf

@@ -1,6 +1,7 @@
 variable "github_token" {
   description = "GitHub token to crate repos"
   type        = string
+  sensitive   = true
 }
 
 variable "project_slug" {
@@ -16,4 +17,4 @@ variable "project_name" {
 variable "cruft_template_url" {
   description = "URL for the Cruft template"
   type        = string
-}
+}